code: def _run_test():
      try:
          tmp = mp.get_context("spawn")
      except RuntimeError:
          tmp = mp
      p = tmp.Process(target=_main)
      p.start()
      p.join()
  
file_path: MONAI/tests/test_loader_semaphore.py
imports: from __future__ import annotations
  import multiprocessing
  import unittest
  import monai
label_desc: Use image node_id 3 for calling a global function with example usage: _run_test() without return types